If you are looking for a PSP homebrew application to give you informative details about your PSP
internal hardware, Then PSP Everest 2.5 is the perfect homebrew application for your. This cool
application will give you some pretty good detail about your PSP that you would get just using your
PSP to get the information.

Quote:Features:

– Rewrite code.
– Added random color of background when start program.
– Added fade when change menu.
– Added detect PSP x010 (Mexico).
– Added exit in XMB about ‘HOME’/’PS’ button.
– Unlocked power switch.
– Added new firmwares support.
– Added PSPgo and PSP-E10xx support.
– Some visual fixes.
– Added switching backgrounds by triggers and fade when switching.
– Added interactivity of ‘Battery Information’ location.
– Added more information to ‘Hardware Information’»’Model’ option.
– Removed some not needed strings in ‘System Information’ and ‘Hardware Information’ locations.
– Added ‘Complete’ status to ‘Battery Information’ » ‘Charging’ option.
– Added able to showing Russian text in ‘System Information’ » ‘Username’ option.
– Fixed detecting not readed battery on battery flashables PSP’s (All Fat and Slim TA-085v1).
– Added able to detecting TA-094.
– Added new algorythm for detecting motherboard and renamed some motherboards.
– Added Russian language (if Russian language selected in ‘System Settings’ in XMB).
– Added able to detecting differences of TA-088v1 and TA-088v2.PSPEverest-2_Rev-5
– Rev.2: fixed freezing in ‘System Information’ location.
– Rev.3: fixed showing incorrect ‘Left Time’ when using in PSP-E10xx.
– Rev.4: fixed bugs with ‘ё’and ‘р’ characters in ‘Username’ option.
– Rev.5: removed some debug functions. Added ‘ё’ and ‘Ё’ symbol to ascii2unicode convert function.
Also, fixed bug with showing ‘Left Time’ if it more 1h 40min.

Source